2731. From those most ancient people it has been heard that conjugial love is of such a nature as to desire to be altogether the other's, and this reciprocally; and that when this is experienced mutually and reciprocally they are in heavenly happiness: also, that the conjunction of minds is of such a nature that this mutuality and reciprocity is in everything of their life, that is, in everything of their affection, and in everything of their thought. On this account it has been instituted by the Lord that wives should be affections of good which are of the will, and husbands thoughts of truth which are of the understanding; and that from this there should be a marriage such as there is between the will and the understanding, and between all things thereof with one who is in the good of truth and the truth of good.